Enamel

Enamel is a hard and white substance that covers the teeth. It protects the more fragile underlying parts of the teeth including the dentin and the pulp. Dental enamel is the hardest substance in the human body and is mostly composed of hydroxyapatite (crystalline calcium phosphate). It is produced by cells called ameloblasts.

Enamel within a tooth

Eroded enamel allows decay-causing micro-organisms to penetrate the tooth. This might lead to the development of cavities, damage to the pulp and nerve, or even the appearance of a dental abscess. Fluoride helps to keep the enamel more resistant to cavities.

Dental Anatomy

Alveolar Bone Apex Cementum Cusp Dentin Enamel Gum Periodontal Ligament Pulp Tooth

References

Naudin C., Grumbach N., Larousse Médical, 3ième édition, Paris, 2003.
Marcovitch H., Black's Medical Dictionary, 41st edition, London, 2005.
Leikin J. B., Lipsky M. S., Complete Medical Encyclopedia, First edition, New York, 2003.
Wikipedia, the free encyclopedia (www.wikipedia.org).
Last update: 25th of November 2007.